I don't believe that. I've heard too many stories of pit bulls turning on their owners even after they've had them for years without problems.

I have family who are pit bull rescuers, they know differently. Like human beings, ANY dog can go bad whether it be a toy poodle, pit bull, German Shepard or a chichuachua. In general, pit bulls are no more dangerous than any other dog, a bad dog is usually the result of having a bad owner.